Wall Street advanced as voters headed to the polls in the US in a neck-and-neck race between President Barack Obama and Republican rival Mitt Romney.
Among the most important battlegrounds are the states of Virginia and Ohio, which both end their voting relatively early, at 7pm and 7.30pm (NZT 1pm and 1.30pm) Eastern Standard Time respectively, according to Reuters.
"I wouldn't expect Ohio or Virginia to be called early, but if it starts to look clear one way or another that would be an early harbinger," political scientist Steven Schier of Carleton College in Minnesota told Reuters.
While the race remains tight, recent polls gave Obama a slight edge. A victory for Obama would make him the first president in two decades to be re-elected with a jobless rate above 6 per cent - and only the second since World War II, according to Bloomberg News.
Indeed, the latest data on the American jobs market was a reminder of the challenging road ahead. A Labor Department report showed that job openings slid to 3.56 million in September from 3.66 million in August, while the hiring rate fell to 3.1 per cent from 3.3 per cent.